Phys. Rev. Lett. 69, 844–847 (1992)Quantum well states as mediators of magnetic coupling in superlatticesReceived 6 February 1992; published in the issue dated 3 August 1992 Quantum well states are found at the Fermi level in Cu on Co(100) and Ag on Fe(100) using inverse photoemission. They appear every 5.9±0.5 layers in Cu/Co(100), which agrees with the 5.5- to 6-layer oscillation period of the magnetic coupling in Cu/Co(100) superlattices. For Ag/Fe(100) they connect with minority-spin interface states observed below EF previously, providing a magnetic coupling channel through the noble metal. These properties are explained in terms of the bulk band structure. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.69.844
DOI:
10.1103/PhysRevLett.69.844
PACS:
75.50.Rr, 73.20.Dx, 75.70.Cn, 79.20.Kz
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